Tool-holder.



V. R. KOONTZ.

TOOL HOLDER.

APPLICATION FILED JAIL Patented Dec. 9. 1913.

II BET 1v 2 SHEETS-$ I l -ZZ d Attorneys V. R. KOONTZ.

TOOL HOLDER.

APPLICATION FILED my 4. m3

1,080,565. Patented Dec. 9, 1913.

2 SHBETSSHEET 2.

J Z'yJZ.

Inventor;

by O Attorneys.

Witnesses VICTOR R. KOONTZ, OF WAYNESBORO, PENNSYLVANIA.

TOOL-HOLDER.

1.,(l8th565.

Application filed January 4, 1918.

Specification of Letters Patent.

Patented Dec. 9, 1913.

Serial No. 740,246.

To all whom it may concern:

Be it known that I, Vioiron R. I(OONTZ, a citizen of the United States, residing at iVaynesboro, .in the county of Franklin and State of Pennsylvania. have invented a new and useful 'looLIIolder, of which the following is a specification.

The present invention relates to improvements in tool holders for cutter heads, the primary object of this invention being the provision of a novel form of tool holder, in which the tool is so disposed as to be moved to and from work engaging position, and whereby the tool itself may be adjusted and locked in such desired ad usted position so as to present its cutting edge to the work in the best possible manner.

A further object of the present invention is the provision of a novel means carried by the tool holder for atiljusting the angularity of the tool while in the tool holder so that the cutting edge thereof is properly presented.

A still further object of the present invention is the provision of means whereby the tool may be adjusted longitudinally and be properly clamped in work engaging position so that the tool may be used for a greater length of time than usual, the sharpcning of the stock shortening the same but permitting its use in connection with he present form of tool holder.

'ith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in t ai s t 0 ns ruc on iereina'er (0" the let 1 it o t t1 t tt l scribed and claimed, it being nmarstood that. changes in the precise embodiment of the invention herein disclosed can he made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a plan view of a portion of a cutter head with the present tool holder connected thereto. Fig. 2 is a similar viev'v showing the tool and dicedjacent portions shown in transverse section. Fig. 3 is a sectional view through the cuttor head showing the grooved portion of the tool and the tool holder in elevation. Fig.

'4 is a section taken on line t at of Fig. 2.

Fig. 5 is an end view showing the method of adjusting the tool with relation to the holder and the scale. Fig. 6 is a section taken on line 6-t3 of Fig. 2.

Fig. 7 is a plan view showing the means for adjusting the angularity of the tool. Fig. 8 is a view similar to Fig. 1 of a modified form of tool holder. Fig. 9 is a perspective view of the main portion thereof. Fig. 1.0 is a perspective view of the tool carrier of the holder. Fig. 11 a perspective view of the tool. Fig. 12 is a section taken on line 12-42 of Fig. 8.

Referring to the drawings, and more particularly to Figs. l through 7, the numeral 1 designates the die holder head, of the form generally employed for forming screw threads upon bolts, the same being provided with the dovetail slot 2 for the sliding reception of the dove-tail member 3 of the tool holder base i. The base 4-, as clearly shown in Fig, l-, is provided with the actuating bolt receiving aperture 5 for the reception of the bolt t3, whereby the base -t has imparted thereto through the actuation of the cutter head. a slidable movement to and from the center of the die holder. The bolt 6 is recessed as at 7 for the reception of the reduced end 8 of the two oppositely disposed adjusting screws 9. The bolt 6 is properly locked in connection with the base 4 by means of the nut 10. Formed inte ral with and carried by the base =l- :t right angles thereto is the upstanding plate ll which constitutes the main support; for the tool carrier 12. said tool carrier 12 being adjust,- ably connected to the outer face of the plate 11 by means of the two bolts 13 and 14, provided with the res )ective heads 13 and ll" which are disposed within the longitudinal groove US of the thread forming tool 17, said tool 1? assuming the position relatively to the carrier 1:2, as clearly illustrated in l igs. 2, land ti. The nuts 13 and l-l. constitute a means for locking the respective bo lts 13 and 'l-l relatively to the tool 17, the ca 'rier l2 and the support 11, the bolt. 13 (0t stit ding a. pivot for the carrier 12 and the tool 17 so that the tool may be adjusted angularlv to dispose its cutting edge at any desired angle to the work. in order to per nut this. the bolt ll is disposed as shown in Fig. (3, through the elongated aperture 1b of the support 11, said elongated aperture 18 being extended vertically to permit the rise and fall of the bolt ll. due to the :uljustmcnt of the adjusting bolt. 19 whose eccentric head 20 is disposed within the recess 21 of the carrier 12. The outer end of the bolt 1 at 19 is shouldered to permit of the engagement therewith of a wrench so that the eccentric or cam 20 may be adjusted to elevate or lower the rear end of the carrier 12 and tool 17, to, as before stated, adjust the angular engagement of the cutting end of the tool relatively to the work. In order to lock the bolt 19 in the desired adjustment, the nut 22 is provided. v

As clearly shown in Fig. 5, the scales 23 and 24 are carried by the respective plate 11 and carrier 12, so that the operator may elevate or lower the carrier 12 and tool 17 according to the desired angle, and may be notified at a glance the position of the tool.

This portion is in reality a gage for adjusting the tool and carrier relatively to the work.

As clearly shown in Figs. 8 through 14, the base 25 of the tool. holder is constructed somewhat similarly to the base 4 and is mounted to be actuated by the bolt 6, which is similar to the bolt 6 and is connected to the cutter head as is usual. The carrying plate 27 in this instance is provided with the two elongated apertures or slots 28-29, the circular abutment 30 add the two threaded parallel apertures 31. Disposed in these threaded apertures 31 are the two adjusting screws 32, which perform thesame function, as will presently appear, as the bolt 19 and eccentric 20 of the structure heretofore described.

The tool carrier 33 as clearly shown in detail in Fig. 10, is provided with the two elongated slots 34 and 35, and with the circular socket 36, said slots being disposed to register with the slots 28 and 29 of the plate 27 while the socket 36 receives the cylindrical projection 30 so that the tool carrier may be swung with the projection 30 its axis. The carrier 33 is further provided with the two parallel ribs 37 which provide a receptacle for the longitudinal movement and adjustment of the tool 41, there being formed rigidly at one end at right angles to the carrier 33, the lug 38 which is provided with the threaded aperture 39 for the reception of the tail adjusting screw 40. Such screw is disposed to engage the end remote from the cutting end of the tool 41 to lock the same against longitudinal movement Within the carrier 33, when the parts are in the assembled position as shown in Figs. 8 and 12. The locking bolts 43 and 44 are. disposed to project through the respective slots 28 -34 and 2935 of the plate 37 and carr' r 33 and have their reduced'threaded ends hereof fit within two of the plurality of threaded sockets 42 formed within the body of the tool 41. By this means the tool is properly adjusted with relation to the carrier and is held in locked position by means of the two bolts 43 and 44 after the same has been properly adjusted relatively to the work to accesses be cut, by means of the screws '32 and the conical sockets 45 formed in the face of the tool carrier 33, as clearly illustrated in Fig. 12. It will thus be seen that the screws 32 and the sockets 45 provide a means for adjusting the carrier 33 relatively to its pivotal points 3036 so as to present the cut ting edge of the tool in the desired cutting position, such adjusting device as herein described being similar to the device including the bolt 19 and eccentric 20 in the form shown in Fig. 1 through 7.

By means of the elongated slots 28-34 and 29-35, the tool 41 may be adjusted longitudinally within the carrier 33 between the ribs 37, and after the angular adjusting devices have been adjusted, the bolts 4344 may be tightened to lock the tool and carrier 33 rigidly with relation to the supporting plate 47 of the holder. By reason of the fact that the tool is provided with a plurality of threaded sockets 42, it is evident that as the tool is sharpened or worn, that the same may be adjusted relatively so that the tool can be used with the least possible Waste.

From the foregoing description, taken in connection with the drawings it is evident that with a tool holder constructed according to and embodying the present invention, that the tool itself is permitted to be adjusted longitudinally of the holder and to have the rear end thereof adjusted angularly so as to present the cutting edge at any desired angle to the work for producing tapered threads or cylindrical threads upon bolts as for machine and lag screws, and that by reason, of the various clamping devices the tool is locked in the desired adjusting position.

What is claimed is:

l. A tool. holder, including a supporting member, a tool carrier, coacting means carried by the tool carrier and supporting member for swingingly connecting the carrier 11c to the supporting member, coacting means also carried by the supporting member and carrier for adjusting the angular relation of the tool carrier to the supporting memher, a tool mounted in the carrier, and 115 means projecting thrdugh the sup orting member and carrier and engaging t e tool to lock the tool in the carrier and the carrier to the supporting member.

2. N tool holder, including a supporting 120 member, a tool carrier, coacting means carried by he tool carrier and supporting member for swingingly connecting the carrier to the supporting member, co'acting in us also -:arried by the supporting mem- 125 her and carrier for adjusting the angular relation of the tool carrier to the supporting memb r, atool mounted for longitudinal movement in the carrier, means for limiting the longitudinal movement, and means we piercing the supporting member and carrier and engaging the tool to lock the tool and carrier to. the supporting member.

3. A tool holder, including a supporting plate, a circular projection carried upon one of the carrier, cooperative means carried by the opposite ends of the supporting plate and carrier for ad usting the carrier relatively to the supporting plate, a tool dis posed in the carrier, and means piercing the snpportin plate, carrier and engaging the tool to 100 a the parts together.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses;

VICTOR R. KOONTZ.

Witnesses .EDUARD \V. Mirrnms,

CHAS. B. CLAYTON. 

